An orange and yellow lobster recently caught off the tip of Cape Cod joins the Aquarium's resident blue lobster and the famous Halloween lobster, which is orange on one side and black on the other.

Billy and Cheryl Souza of North Truro found the female lobster earlier this month in one of their traps and donated it to the Aquarium.

Orange or yellow lobsters have been estimated to have an incidence of about 1 in 30 million in the wild, according to the Aquarium. Blue lobsters are much more commonplace at about 1 in 2 million, while split lobsters like the Halloween lobster are more rare at 1 in 50 million, the Aquarium said.

Lobsters also can be found in calico or white -- which is the rarest of all.